Kelly Bar's Maintenance

Request a Quote

View All: http://cgeg-exploration.com/2-1-5-geological-drilling-rig.html

Regular and effective maintenance can extend the service life of Kelly bars.

1. Maintenance Schedule

※Depending on the working hours of engine※

2. Maintenance Content

No.	Part	Damage condition	Diagram
1	External drive key	Edge curling, worn	Diagram one: 1. 1-3mm edge curling; timely polish it 2. 5mm wear; weld the worn part using wear-resistant rod and overlaying method. After welding, rub down the joint to 90°. 3. Change the part if it is seriously worn.
2	Pressurizing block	Wear	Diagram two: Max. wear extent: 5mm; Weld the worn part using wear-resistant rod and overlaying method. After welding, rub down the joint to 90°. Change the part if it is seriously worn
3	External key, Kelly bar shell body	Rupture	Diagram three: 1. Use angle grinder to grind the ruptured part to 60°, with a V-shape groove; then use J506 welding rod to weld the groove and grind the joint. 2. Add three support plates around peripheral direction and weld them using splice joint welding method, ideally supporting the ruptured part
4	Drain pallet	Wear	Diagram four: Normal wear: weld it using bead welding method and grind Serious wear: change the part
5	Spring	Breakage	Change
6	Bolt	Damage	Change
7	Upper damping ring	Damage	Change
8	Pin	Damage	Change
9	Joint	Deformed with flaw	Repair or change